ARCHITECTURE Lecture Notes - Lecture 4: Mercalli Intensity Scale, Richter Magnitude Scale

• School: University of Northern Philippines
• Department: Architecture
• Course: ARCHITECTURE
• Professor: Rabena

Document Summary

Tremor noticed by many, but they often do not realize it is an earthquake. Feels like a truck has struck the building. Poorly built structures considerably damaged; slight damage elsewhere. All buildings considerably damaged, many shift off foundation. The modified mercalli scale is somewhat subjective, because the apparent intensity of an earthquake depends on how far away from its center the observer is located. Rating intensities from i to xii, it describes and rates earthquakes in terms of human reactions and observations. The richter scale measures the motion of the ground 100 km (60 mi) from the earthquake"s epicenter, or the location on the earth"s surface directly above where the earthquake occurred.